Backup of Supermemo.com to TSV (on page with Course editor choose Change Order and run this script in console, it will export only selected section of selected course)

sm_backup.js

(function() {
	var dataPole=[];
	document.querySelectorAll(".course-editor-browser-page-item").forEach(
		function(line) {
			var c1=line.querySelectorAll("div.page-item-content")[0].querySelector("div").innerText;
			var c2=line.querySelectorAll("div.page-item-content")[1].querySelector("div").innerText;

			/* transform enters */
			c1 = c1.replace(/\n/g,"\\n");
			c2 = c2.replace(/\n/g,"\\n");
			dataPole.push([c1, c2]);
		}
	)
	/* we gattered data, now format export */
	var exportPole = [];

	dataPole.forEach(function(item) { exportPole.push(item.join("\t"));  });
	var tsv=exportPole.join("\n")
	console.log(tsv);
	window.open("data:text/tab-separated-values," + encodeURIComponent(tsv));
}())